2002 Mercedes-Benz C240 Q&A
2002 Mercedes-Benz C240 Question: Engine Misfires
If the Check Engine Light/Service Engine Soon light illuminates while you are driving, the car's on board computer sees a fault in the engines management system that is causing an excess amount of pollutants to be emitted from your car. This could result in engine damage if left neglected. Some problems that can cause the Check Engine light to stay on may take two "drive cycles' to complete before illuminating the Check Engine Light. The computer sees a problem and looks for an identical set of circumstances to occur to confirm that it has indeed seen a problem before turning on the light. A Check Engine light that continually flashes while you are driving is serious and is a sign that the computer sees a problem that seriously risks damaging the catalytic converter which may result in an expensive repair or even may cause a fire! Diagnostic codes are stored in the vehicle's computer and can be retrieved using a scantool that communicates with the computer in your car. We have in our Repairpal website an encyclopedia with in depth articles about computer, and computer control systems, emission and driveability problems. http://repairpal.com/check-engine-light You will need to retrieve the codes stored in the computer in your car to narrow down where the problem is or what cylinder or cylinders are mis firing. - patrick mannion
Engine lite keeps coming on saying cylinder misfire
Bad spark plug wires can cause misfires; the Check Engine Light may illuminate.
THIS ONLY HAPPENS WHEN DRIVING 20 MILES OR MORE, CHECK ENGINE LT. COMES ON, CODE READS MULTI MISFIRES. A PUFF OF SMOKE COMES OUT TAIL PIPE WHEN THIS HAPPENS (GRAYESH). WHEN I TURN KEY OFF WAIT A FE...
the car run great, but at idel run rough. nor sure if filter air or fuel. 80k miles. engine check light on dash
light had come on before, put higher octane gas, went off, changed plugs, went on long trip with lower octane gas with booster, now using nothing but 93 octane gas.